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HINODE Operation Plan (HOP)

accepted on


 HOP No.

 HOP title

HOP 0402

AR outflows dynamics with IRIS, SST and Hinode/EIS

plan term


@ @


 name : Polito, De Pontieu, Brooks @  e-mail : polito[at]baeri.org, bdp[at]lmsal.com, dhbrooks.work[at]gmail.com

contact person in HINODE team

 name : Savage, Watanabe, De Pontieu @  e-mail : sabrina.savage[at]nasa.gov, watanabe.tetsuya[at]nao.ac.jp, bdp[at]lmsal.com

 abstract of observational proposal
Main Objective: Studying the dynamics of the low atmosphere counterpart of the AR outflows using IRIS and SST  

Scientific Justification: Strong and persistent blueshifts at the edge of active regions (so-called gactive region outflowsh) are routinely observed by EIS in the spectra of high-temperature lines such as Fe XII, and are widely considered to be a candidate source of the slow solar wind (e.g. Harra et al. 2008, Doschek et al. 2008, Brooks et al. 2011, 2012). To fully understand how these outflows are driven, which is crucial to both coronal heating and solar wind studies, we need to characterize their evolution through different layers of the solar atmosphere, from the chromosphere to the corona. We will use SST and IRIS observations to investigate the spectral properties of chromospheric and TR lines (e.g. H alpha, Ca II H/K, Mg II, CII, SI IV) at very high spatial, temporal and spectral resolution. This will allow us to obtain information on the physical conditions of the plasma, such as flows, velocity gradients and turbulence, and investigate the response of the low atmosphere counterpart of the coronal outflows. EIS observations over a broader range of temperatures will fill the gap between the TR and corona and provide measurements of flows, densities and abundances in the outflows regions. SST/CRISP will also provide high-quality Mg I magnetograms, which are crucial to understand the magnetic connectivity in these regions.

 request to SOT
We would like to request a large SP raster map covering 120hx170h of the duration of ~1h.

 request to XRT
Al-poly long/short pairs, cadence 60-90 sec, FOV 384x384 or 512x512 pixels, depending on active region size.

 request to EIS
Like IRIS, we would like EIS to run repeated fast scans to fill 2-3 hours, and two large context scans, one at the beginning and one at the end of the observation window.

Program to run for the large context scans:  
1 x #521 HPW021VEL120x512v2_b FOV: 120"x512", 45s exposures with 1" slit ~ 50 mins

Programs to run for the fast scan:  
#206 IUU_SCAN_STEPS_001 FOV: 24"x512", 30s exposures with 2" slit ~  2 mins
#464 DRW001_HI_BRT_V3   FOV:  10"x240", 30s exposures with 1" slit ~6 mins

 other participating instruments
IRIS requests:  
The IRIS observation has been approved by Bart De Pontieu.
IRIS will perform multiple high-cadence scans as well as two large context scans (HOP 307), one at the beginning and one at the end of the observation window.

OBSID for the large context scans (HOP 307):  
3620108077  |  Very large dense 320-step raster 105.3x175 320s   Deep x 8 Spatial x 2  |    2937.36    | 2051.85    |      0.48     |  9.2+/-0.1 | 2937+/-0   | 36.7+/-0.0 | 36.7+/-0.0 | 36.7+/-0.0 | 36.7+/-0.0

OBSID for the high-cadence scans:
3600106039  |  Large sparse 16-step raster 15x120 16s   Deep x 4 Spatial x 2, Spectra  |      83.12    | 77.88    |      0.64     |  5.2+/-0.1 | 83.1+/-0.0 | 20.8+/-0.0 | 20.8+/-0.0 | 20.8+/-0.0 | 20.8+/-0.0


- 2023 May 3-16 : 8 - 10 UT: IHOP401 would be our primary program during this campaign (focused on AR neutral lines, unless otherwise specified). If the IHOP401 data are sufficient, we may request to to switch to IHOP402 (outflows program) for the remainder of our campaign.

- The SST-IRIS coordinated campaign will be run from June 4 to June 17 2020. The coordination with Hinode would be run during this time if a suitable AR target is present. Consecutive days are desired, but not required.

Time window:  07:30-12 UT is the tentative time window for the coordinated SST-IRIS campaign. Ideally we would like that SST, IRIS and Hinode observe the same target for at least 2-3h during this time window.

Target(s) of interest:  Edge of active region with stronger outflows.  

Previous HOPs: None

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